/Engine/Source/Runtime/Foliage/Public/InstancedFoliageActor.h
Add a new static mesh.
[FFoliageInfo](API\Runtime\Foliage\FFoliageInfo) * AddMesh ( [UStaticMesh](API\Runtime\Engine\Engine\UStaticMesh) * InMesh, [UFoliageType](API\Runtime\Foliage\UFoliageType) ** OutSettings, const [UFoliageType_InstancedStaticMesh](API\Runtime\Foliage\UFoliageType_InstancedStaticMesh) * DefaultSettings )